/// <summary>
/// 设置UCS的原点
/// </summary>
/// <param name="ucsId">UCS的Id</param>
/// <param name="pt">要设置的UCS原点坐标</param>
public static void SetUCSOrigin(this ObjectId ucsId, Point3d pt)
{
Database db = ucsId.Database;
var trans = db.TransactionManager;
//打开UCS
UcsTableRecord utr = trans.GetObject(ucsId, OpenMode.ForRead) as UcsTableRecord;
if (utr == null)
{
return; //若UCS不存在，则返回
}
utr.UpgradeOpen(); //切换UCS为写的状态
utr.Origin = pt; //设置UCS的原点
utr.DowngradeOpen(); //为了安全，切换UCS为读的状态
}
/// <summary>
/// 旋转UCS
/// </summary>
/// <param name="ucsId">UCS的Id</param>
/// <param name="rotateAngle">旋转角度</param>
/// <param name="rotateAxis">旋转轴</param>
public static void RotateUCS(this ObjectId ucsId, double rotateAngle, Vector3d rotateAxis)
{
Database db = ucsId.Database;
var trans = db.TransactionManager;
//打开UCS
UcsTableRecord utr = trans.GetObject(ucsId, OpenMode.ForRead) as UcsTableRecord;
if (utr == null)
{
return; //若UCS不存在，则返回
}
utr.UpgradeOpen(); //切换UCS为写的状态
Vector3d xAxis = utr.XAxis; //UCS的X轴方向
Vector3d yAxis = utr.YAxis; //UCS的Y轴方向
//旋转UCS
utr.XAxis = xAxis.RotateBy(rotateAngle * Math.PI / 180, rotateAxis);
utr.YAxis = yAxis.RotateBy(rotateAngle * Math.PI / 180, rotateAxis);
utr.DowngradeOpen();//为了安全，切换UCS为读的状态
}